it makes perfect sense that Wifies would be a thoughtful, generally kind apparition for Wato to hallucinate. he represents someone who has been directly hurt by Wato who still loves them and supports them in everything. they wanted comfort, and who better to comfort them than someone who will always forgive them if they fail? but that's not quite what Wifies is to Ken. to Ken, despite getting the same love and forgiveness from him, Wifies is a grave mark of her failures. if she hadn't let her hubris get to her head, if she hadn't fallen into obsession, the domino effect that lead to Evilfies acquiring the mask and causing all the suffering he did wouldn't have happened (maybe. probably. it's easier to blame herself than admit that there is unfiltered evil in people. because if he was always evil, she too could've always been evil. easier to blame herself and in turn blame the mask. he who is afraid of admitting the human capacity for evil and all that). so perhaps, after somewhat selfishly abandoning Wato, if Ken hallucinated Wifies, she would want absolution for what she has done— to Wato, to Wifies, to everyone— and her version of Wifies would stand there and say, "you know you cannot be forgiven, Ken." and she would know in that moment that he is not real because that's something only Ken would ever say to herself.
